import java.util.*;

public class Main {
    static final int MOD = 1000000007;
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int p = sc.nextInt();
        int k = sc.nextInt();
        long prevZero = 1;
        long prevNotZero = 0;
        for (int i = 0; i < k; i++) {
            long nextZero = (prevZero * (p + 1) + prevNotZero * 2) % MOD;;
            long nextNotZero = (prevZero * (p - 1) + prevNotZero * (2 * p - 2)) % MOD;
            prevZero = nextZero;
            prevNotZero = nextNotZero;
        }
        System.out.println(prevZero);
    }
}